The U. S. is the largest importer of aquatic foods, which includes fresh and saltwater fish, crustaceans, mollusks, and aquatic plants served in restaurants and homes. A critical piece of this global market is the cold chain, keeping these foods chilled or frozen during storage and transport to market. With 44 percent of aquatic foods sold live or fresh globally, the percentage of fresh over frozen aquatic foods creates an extra logistical cold chain challenge. What's more, most aquatic foods become, well, fishy from cold chain disruptions, which can cause perceived food safety concerns, potentially resulting in food getting tossed into the bin. Until recently, research to understand just how much aquatic food gets wasted or lost has been spotty. However, in a recent Nature Food article, researchers argue that aquatic food loss and waste in the United States is actually half of earlier estimates. And that's good news that we'll explore today. This interview is part of an ongoing exploration of food loss and waste. This episode is co-hosted by environmental economist, Martin Smith at Duke University's Nicholas School of the Environment. Interview Summary Martin Smith - So I'm really pleased to introduce our guests for today. First up from University of Florida, a natural resource economist, Frank Asche. Frank is a long-time collaborator of mine and a good friend. And he's also one of the world's leading experts in seafood markets and trade. And honestly, Frank has taught me just about everything I know about aquaculture. Also today, we have Dave Love from the Johns Hopkins Center for a Livable Future. Dave is someone whose work I'm also very familiar with and is a leading expert in food systems and sustainability. And recently in my classes, I have often said out loud to some student questions that I don't know the answers to. I'll bet Dave Love knows the answer to that question. Norbert Wilson - So Dave, let's begin with you. Why was it important to develop better estimates and methods of aquatic food waste in the US? Why did your team pursue this research question? Dave Love - Great question. So, the US government has a goal of cutting food waste in half by 2030. And if you want to know how much you need to cut, you really need to go out and measure. And that's one of the areas of food waste that we really don't know a lot about for many different types of foods. We know the production data. We know how much is produced. We have a pretty good sense of what's consumed, whether that's in an economic sense of being consumed or actually eaten. But we really don't know how much is wasted. And groups come to the table with different numbers, different estimates, and they, they make their way into reports, into national guidelines. But for seafood in particular, the estimates haven't been refreshed in a while. So, it was about time to do that. And this study aimed to tackle that issue from all the stages of the supply chain, from production to consumption, looked at different forms of seafood and among the top 10 species. So, we rolled those species estimates and stage estimates into a national number. So yeah, that that's, that's why we did it. And we were really surprised at what we found. Norbert - Well, what surprised you? Dave - Well, earlier estimates were that about half of seafood was lost or wasted in the US and that came from UN Food and Agriculture Organization data. And when we actually crunched the numbers for the US supply, we thought it was more like 22.7 percent is wasted. So, a lot less than the FAO estimate. Which means we're doing a good job in some areas, but there's also room for improvement in others. Martin - So, Frank, maybe you could tell us a little bit more about the key takeaways from this Nature food paper are? Frank Asche - It's really that it's important to recognize that we are consuming a lot of different species and they have very, very different characteristics. For instance, the filler yield of a salmon is about 65 percent while for a cod it is about 40%. That makes your starting point really important. Moreover, this thing of looking at the whole supply chain is important because there are different ways to organize it, and there are a lot of potential uses for what food is sometimes wasted. And to look into what different types of producers are actually doing. What different companies that are operating these cold chains that Norbert spoke about are doing. And what they are doing when these things break apart. Kind of, there's all these people in the supply chain that may help us, and some of them do. Some of them aren't very good at it. But it's really nice to find that there are best practices that can really help us a lot of people take the trouble to figure that out and follow that up. Martin - That's really interesting. And it makes me wonder with all this heterogeneity that you're describing, are large producers better positioned to manage or, or reduce food waste ...
